linux-kernel - [PATCH] gpu: nova-core: fix bounds check in PmuLookupTableEntry::new

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Message-ID: <20250713025108.9364-2-krakow20@gmail.com>
Date: Sat, 12 Jul 2025 19:51:08 -0700
From: Rhys Lloyd <krakow20@...il.com>
To: dakr@...nel.org,
	acourbot@...dia.com
Cc: airlied@...il.com,
	simona@...ll.ch,
	nouveau@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	rust-for-linux@...r.kernel.org,
	Rhys Lloyd <krakow20@...il.com>
Subject: [PATCH] gpu: nova-core: fix bounds check in PmuLookupTableEntry::new

data is sliced from 2..6, but the bounds check data.len() < 5
does not satisfy those bounds.

Fixes: 47c4846e4319 ("gpu: nova-core: vbios: Add support for FWSEC ucode extraction")

Signed-off-by: Rhys Lloyd <krakow20@...il.com>
---
Changes in v2:
- Ensure commit description does not spill into commit message
- Fix author to match SoB
- Add "Fixes:" tag
- Add base commit

---
 drivers/gpu/nova-core/vbios.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/nova-core/vbios.rs b/drivers/gpu/nova-core/vbios.rs
index 663fc50e8b66..5b5d9f38cbb3 100644
--- a/drivers/gpu/nova-core/vbios.rs
+++ b/drivers/gpu/nova-core/vbios.rs
@@ -901,7 +901,7 @@ struct PmuLookupTableEntry {
 
 impl PmuLookupTableEntry {
     fn new(data: &[u8]) -> Result<Self> {
-        if data.len() < 5 {
+        if data.len() < 6 {
             return Err(EINVAL);
         }
 

base-commit: 215a3f91713383a3c0d2da82d223a608a3c17ac1
-- 
2.50.1